title: [Lactose malabsorption in adult patients at the Hospital das Clínicas de Ribeirão Preto].
abstract: A standard oral lactose tolerance test (LTT) was performed in 32 white and 18 non-white hospitalized Brazilian adults. A flat LTT was found in 22 (68,75%) white and in 17 (97,45%) non-white patients indicating a 78% overall rate of lactose malabsorption, Both lactose absorbers and malabsorbers showed a modal milk ingestion of less than a 1 glass/day. Symptoms related to milk consumption or lactose administration were more common among lactose malabsorbers. Estimations of disaccharidase activity in intestinal mucosa specimens obtained by peroral biopsy in 28 patients confirmed a high prevalence of lactose deficiency, and disclosed only one false result, in the patient with a flat LTT and high intestinal lactase levels.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000201:enzymology; D007785:Lactose / Q000378:metabolism; D007787:Lactose Intolerance / Q000175:diagnosis*; D007789:Lactose Tolerance Test; D008297:Male; D008875:Middle Aged; D008892:Milk / Q000378:metabolism; D001616:beta-Galactosidase / Q000378:metabolism
chemical_list: D001616:beta-Galactosidase; D007785:Lactose
vernacular_title: Mal-absorção de lactose em pacientes adultos do Hospital das Clínica de Ribeirão Preto.